Did the SBS raid Sweden?

A recently published book alleges that SBS commandos took part in operations along the Swedish coastline during the 80s and 90s. The missions were part of a series of operations designed to trick the Swedes into believing that the Russians were violating their territory. The rumour says that a series of clandestine operations were carried out, mostly involving British submarines sending out sonar sweeps on known Soviet frequencies. A number of incursions onto Swedish soil by SBS commandos were also reported to have occured, presumably purposely leaving some trace of their presence or activities for the Swedes to find.